PDP Success Rate (PDP SR) in 2G/3G Network
PDP Success Rate (PDP SR), is an important metric in 2G/3G mobile network. It measures the percentage of successful PDP context activations established between the mobile device and the mobile network.
A high PDP success rate, (e.g. above 95%), is generally considered a good indicator of a well-performing mobile network.
Typically PDP SR is calculated using the following formula,
PDP SR = [PDP successful activation times / PDP activation requests] * 100
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PDP Context Deactivation Procedure
The MS, the SGSN, and the GGSN can initiate The 'PDP context deactivation procedure'. PDP Context Deactivation Procedure (MS initiated) The MS sends 'Deactivate PDP context request' to the SGSN, including the TI of the PDP. There is an information element (IE) in this message, which is the 'Teardown Indication'. If this IE exist, this…
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PDP Context Modification Procedure
In case one of any parameters associated with the PDP context changed, like the QoS as example. The node in which the PDP context is changed should initiate 'PDP Context Modification' procedure. This is in order to inform other nodes about this change. The PDP context exists on the MS, the SGSN, and the GGSN.…
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PDP type in GPRS
PDP type is the type of the IP address assigned to the PDP. PDP type maybe one of the following, IPv4. IPv6. IPv4v6 (Dual stack). The PDP type exists in subscription information that exists in the HLR for every MS. The MS puts the requested 'PDP type' in the 'PDP activation request' sent to the SGSN…
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PDP address in GPRS
As a result of the 'PDP activation' procedure, the GGSN assigns the 'PDP context' an IP address. The 'PDP address' is the IP of the 'PDP context'. The 'PDP address' may be 'Dynamic', or 'Static' . Dynamic PDP address The GGSN assigns a dynamic IP to the 'PDP context' from a pool of IP addresses…
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GTP tunnel and TEID
TEID refers to 'Tunnel End Point Identifier'. After creating a PDP context between the MS and the GGSN, the data is sent transparently between the MS and the GGSN. In other words, for computer networks geeks, there is a virtual point to point connection between the MS and the GGSN. TEID - GTP tunnel between…
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Direct Tunneling in 3G
In order to reduce the load of passing the user plan data by the SGSN, the SGSN may decide to establish direct tunneling between the RNC and the GGSN. This will make the user plan data pass directly between the RNC and the GGSN, while keeping the control plan passing by the SGSN. This will…
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Your Guide for PDP context activation procedure in 3G
At the end of this procedure, 'PDP' is established between the MS and the GGSN. The GGSN assigns an IP address for this 'PDP. This is because the MS will use this 'IP address' to deal with the PDN. In addition, the GGSN should assign a Quality of Service 'QoS' for this 'PDP'. 'PDP context'…
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